How Thick Is an Air Mass

Air masses form over a large area; they can be 1,600 km (1,000 miles) across and several kilometers thick.

Which of the following are common air mass types?

The 4 types of air masses are polar, tropical, continental and maritime.

What do all air masses have in common?

Air masses have fairly uniform temperature and moisture content in horizontal direction (but not uniform in vertical). Air masses are characterized by their temperature and humidity properties.